Chemistry - f-block Question with Solution | TestHub

Zirconium and Hafnium have identical radii of$160\mathrm{pm}$and$159\mathrm{pm},$respectively as a consequence of lanthanoid contraction.

lanthanoid reveal only$+3$oxidation state.

The lanthanoid ions other than the${\mathrm{f}}^0$type and the${\mathrm{f}}^{14}$type are all paramagnetic.

The overall decrease in atomic and ionic radii
from lanthanum to lutetium is called lanthanoid
contraction.